CEOI 2027 will take place in Poznań, Poland, 30 August – 5 September 2027.
The Central European Olympiad in Informatics is an annual programming competition for secondary-school students. It has been held since 1994, with the host country changing from year to year.
Contestants qualify through national competitions and represent their countries at CEOI. They compete individually, writing programs to solve algorithmic problems. There are two contest rounds, each lasting five hours. Solutions are tested for correctness and must run within the given time and memory limits.
Besides the contest, CEOI gives students and team leaders a chance to meet, discuss problems and spend time together.